摘要
"等量关系"的学习需要学生经历从特殊到一般、从直观到抽象的归纳过程,包括:学生借助天平游戏初步认识等量关系;在具体生活情境中尝试抽象出等量关系;结合具体情境归纳找等量关系的一般方法;逐步体会等量关系事实上是同一件事情,方程两边的东西是同一件事情的不同角度、不同方面的刻画和写照.学生在抽象等量关系、归纳找等量关系的方法的过程中逐步发展模型意识,理解等量关系的本质,为后续方程的学习奠定良好的基础.
Abstract
The learning of"equivalent relation"requires students to experience the induction process from the special to the general,and from the intuitive to the abstract,including the of use balance games to preliminari-ly understand equivalent relation,abstraction of equivalent relations in the concrete life situation,summary of general methods of finding equivalent relations according to specific situations,and realization of the connotation of equivalence relation,that is,things on both sides of the equation are the portrayal of different angles and as-pects of the same thing.In the process of abstractions and methods of finding equivalence relations,students grad-ually develop model awareness and understand the nature of equivalence relations,which lays a good foundation for the subsequent study of equations.
NETL
NSTL
万方数据